St. Catherine's Milling and Lumber Co. v. The Queen (1888) 14 App. Cas. 46 (J.C.P.C.) was the leading case on aboriginal title in Canada for more than 80 years. The Judicial Committee of the Privy Council held that aboriginal title over land was allowed only at the crown's pleasure, and could be taken away at any time.
Lord Watson identified the source of aboriginal title was from the Royal Proclamation of 1763 which gave Indians "a personal and usufructuary right, dependent upon the good will of the Sovereign".